松林生态系统退化评价及其与马尾松毛虫灾害关系的研究

通过对长沙县丘陵区马尾松林生态系统进行调查研究,选取生物途径、生境途径以及生态系统功能途径3个诊断途径,采取多途径综合诊断的方法对丘陵区马尾松林生态系统退化程度进行诊断,确认其退化程度,在此基础上分析松林生态系统退化程度与马尾松毛虫灾害的关系。结果表明马尾松毛虫灾害发生程度与生态系统退化程度关系密切。生态系统退化越严重的地区,马尾松毛虫灾害越严重,退化较轻的地区,马尾松毛虫灾害较轻或不发生。

Assessment of the degradation of pine ecosystem and relationship between the degradation and damage of Dendrolimus punctatus

Based on the data from surveys of the masson pine forest ecosystems in hills of Changsha County,selecting three diagnostic approaches of biology,habitat and ecosystem function,with multi-approach comprehensive diagnostic method to determine the degradation degree of pine ecosystem and analyze the relationship between degradation degree of pine ecosystem and the damage of Dendrolimus punctatus in hills.The result indicates that the relations of the damage degree of Dendrolimus punctatus and the degradation degree of ecosystem are very close.The more the ecosystem degrades,the more seriously Dendrolimus punctatus damages in the area,whereas the less the ecosystem degrades,the less seriously or no Dendrolimus punctatus damages.